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class ExceptionExample {
  public static void main(String[] args) throws FileNotFoundException {
    // Linux stores a user's home directory path in the environment variable 
    // $HOME, Windows in %APPDATA%
    FileInputStream fis = new FileInputStream("c:\\"System.getenv("HOME") + args[0]); // Windows
  }
}

try {
  FileInputStream fis = new FileInputStream("c:\\"System.getenv("APPDATA") + args[0]);
} catch (FileNotFoundException e) {
  // Log the exception
  throw e;
}